#include<stdio.h>

int main(){
	int i = 0,j = 0,k = 1;
	int a[4][4];
	for(j = 0;j < 4;j ++){
		for(i = 4-j;i < 4){
			a[i][j] = k;
			k ++;
			a[j][i] = a[i][j];
		}
	}
	return 0;
}
